Well the fourth one went way off of the plot line of the other three, I think. In addition, the forth one also lost some of the best actors including Orlando Bloom (Will Turner) and Keira Knightley (Elizabeth Swan) so in the fifth movie, I personally think that they should bring Orlando and Keira back and get back onto the plot line of the first three, but my opinion is probably a very unpopular one, so I'm sure they'll continue what they were doing in the fourth one with the mermaids, magic, and what not. I just wish they'd return the story to what is was originally. I think before the fourth movie, Pirates of The Caribbean was a much more original idea.